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DOCUMENTATION
HAZOP/LOPA
Qualify safeguards as
true IPL
Alarm List &
Operator Manual
Set-point
determination
Priority of alarm &
diagnostic alarm
Operator response
Instrument
Specification
Influences the sensor
and final element
design
Evaluate during
procurement
Future
modifications/upgrade
SRS
Design margin between
PST and SIFRT
Target SIFRT each SIF
Performance Results
Slide 19
Challenges in Achieving Safety Instrumented Function Response Time for a Fast-Acting Process• K. Rampaul, A.
Barnwell & S. Sookhoo